Function 如何更改sqlite get函数？

如何更改Get函数，使其只返回一个设备对象

func GetEquipmentByID(Id string) (equipment Equipment, err error) {
    equipment = Equipment{}
    err = Db.QueryRow("select ID, Name, Description, ImgPath, Category, Availability, Amount, Storage from Equipment where Id = $1", Id).Scan(&equipment.ID, &equipment.Name, &equipment.Description, &equipment.ImgPath, &equipment.Category, &equipment.Availability, &equipment.Amount, &equipment.Storage)
    return 
}

我想使用此功能填充控制器中的设备阵列。但是现在它不起作用了，因为我的函数返回2个对象（设备和错误）

我想在这里使用它：

    func Cart(w http.ResponseWriter,    r   *http.Request)  {
        data := CartData{ 
        Name: "Cart",
        Equipment: model.GetEquipment(model.Db),
        CartList: nil,  
        Pages: []Page{
            {
                Title: "Meine Geräte", 
                Active: false,
                Link: "/my-equipment",
            },
            {
                Title: "Equipment", 
                Active: false,
                Link: "/equipment",
            },
            {
                Title: "Logout",
                Active: false,
                Link: "/logout",
            },
        },

    }

        session, _ := store.Get(r, "cookie-name")


      list := session.Values["EquipmentIDs"].(string)

      result := strings.Split(list, ",")
      for i := range result {
            fmt.Print(i)
            fmt.Println(result[i])
        }



     for i:= range result {
equipment, err := model.GetEquipmentByID(result[i])
if err != nil {
    // handle error
}
data.CartList[i] = equipment // ERROR BECAUSE OF THIS LINE
}



        tmpl:= template.Must(template.ParseFiles("template/base_user.html", "template/cart.html"))
        tmpl.ExecuteTemplate(w, "base", data)
        }
    }

---

所以我的第二个问题是，我如何在我的cart函数中传递数组作为Go中的数据，永远不要忽略错误。比如说,

equipment, err := model.GetEquipment(model.Db)
if err != nil {
    // handle error
}
data := CartData{ 
    Name: "Cart",
    Equipment: equipment,
    // ...
}

---

在围棋中，永远不要忽略错误。比如说,

equipment, err := model.GetEquipment(model.Db)
if err != nil {
    // handle error
}
data := CartData{ 
    Name: "Cart",
    Equipment: equipment,
    // ...
}

---

append方法解决了我的问题

    session, _ := store.Get(r, "cookie-name")
    list := session.Values["EquipmentIDs"].(string)

      result := strings.Split(list, ",")
      for i := range result {
            fmt.Print(i)
            fmt.Println(result[i])
        }

var List[]model.Equipment

        for i := range result {
        equipment, err := model.GetEquipmentByID(result[i])
        if err != nil {
            // handle error
        }
        fmt.Println(i)
        fmt.Println(equipment)
        List = append(List,equipment)
    //  List[i] = equipment
    //  data.CartList[i] = equipment
        }


fmt.Println(List)
    data := CartData{ 
    Name: "Cart",
    Equipment: model.GetEquipment(model.Db),
    CartList: List,
    Pages: []Page{
        {
            Title: "Meine Geräte", 
            Active: false,
            Link: "/my-equipment",
        },
        {
            Title: "Equipment", 
            Active: false,
            Link: "/equipment",
        },
        {
            Title: "Logout",
            Active: false,
            Link: "/logout",
        },
    },

}

---

append方法解决了我的问题

    session, _ := store.Get(r, "cookie-name")
    list := session.Values["EquipmentIDs"].(string)

      result := strings.Split(list, ",")
      for i := range result {
            fmt.Print(i)
            fmt.Println(result[i])
        }

var List[]model.Equipment

        for i := range result {
        equipment, err := model.GetEquipmentByID(result[i])
        if err != nil {
            // handle error
        }
        fmt.Println(i)
        fmt.Println(equipment)
        List = append(List,equipment)
    //  List[i] = equipment
    //  data.CartList[i] = equipment
        }


fmt.Println(List)
    data := CartData{ 
    Name: "Cart",
    Equipment: model.GetEquipment(model.Db),
    CartList: List,
    Pages: []Page{
        {
            Title: "Meine Geräte", 
            Active: false,
            Link: "/my-equipment",
        },
        {
            Title: "Equipment", 
            Active: false,
            Link: "/equipment",
        },
        {
            Title: "Logout",
            Active: false,
            Link: "/logout",
        },
    },

}

---

换了我的职位。现在我收到以下错误消息：undefined Cartlist这是错误所在的位置：Cart[i]=equipment@ChristopherG1994：

CartList[i]=设备

：错误

未定义的CartList

：

数据.CartList[i]=设备

。这会给我以下错误：对于i:=范围结果{设备，错误：=model.GetEquipmentByID（结果[i]）如果err！=nil{//handle error}fmt.Println（设备）data.CartList[i]=device}紧急服务[：：1]：60965:运行时错误：索引超出范围可能是因为CartData中的Cart:nil，但我还必须使用什么？更改了我的帖子。现在我收到以下错误消息：undefined Cartlist这是错误所在的位置：Cart[i]=equipment@ChristopherG1994：

CartList[i]=设备

：错误

未定义的CartList

：

数据.CartList[i]=设备

。这会给我以下错误：对于i:=范围结果{设备，错误：=model.GetEquipmentByID（结果[i]）如果err！=nil{//handle error}fmt.Println（设备）data.CartList[i]=device}panic serving[：：1]：60965：运行时错误：索引超出范围可能是因为Cart:nil，在CartData中，但我还必须使用什么呢？虽然这个代码片段可以解决这个问题，但确实有助于提高帖子的质量。请记住，您将在将来回答读者的问题，而这些人可能不知道您的代码建议的原因。谢谢您的建议。在将来，我将努力提高我的文章的质量。虽然这个代码片段可能会解决这个问题，但它确实有助于提高你文章的质量。请记住，您将在将来回答读者的问题，而这些人可能不知道您的代码建议的原因。谢谢您的建议。今后我会努力提高我的帖子质量。